Excelsior-knife.



J. W. KEOGH.

EXCELSIOR KNIFE.

I APPLICATION FILED JAN-5.1916.

Patented Mar. 21, 1916.

M 15/12 A KfiK/\/\ \K\Kr\ kf\fi\ \f N 314mm i2 w vfi/easesr jme zi h J52 Java e 4 JOHN W. KEOGI'I, OF CHICAGO, ILLINOIS.

EXCELSIOR-KITIFE.

- Specification of Letters Patent.

Patented Mar. 21, 1916.

' Application filed January 5, 1916. Serial No. 70,397.

instead of being shaved OK in blanket form would be cut into separate strips of a size to form excelsior' of the desired gage. Furthermore, it has been found desirable that the cutting edges of the shaving-knife be inclinedto their path of movement, to produce a shearing action on the wood being.

shaved as thereby the shavingproduced is of a form better adapted for use as excelsior,

;than where the shaving is produced by a knife having its cutting edge, or edges, so

disposed as to out the wood after the man-. ner of an ordinary plane or chisel, namely,

with their cutting edges at right angles to their plane of movement. It isalso desirable that side-thrust of the knife against the wood-block being operated on be reducedto p.

the minimum, for obvious reasons. f a

My primary object is to provide an 1mproved form of shaving-knife, which Wlll operate on the desired shearing principle referred to, and whereby the wood operated on will be properly shaved into strips of the desired width for use as excelsior without requiring the use of separate scoring means. Referring to the accompanying drawing: Figure 1 is a plan view of my improved knife. Fig. 2 is a View in side elevation of the knife. Fig. 3 is a section taken at the line 3 on Fig. 1 and viewed in the direction of the arrow; and Fig. 4, a bottom plan view of the cutting-edge portion of the knife.

The general form of the knife shown 1n the drawing is that which is common to excelsioncutting knives, the slots 5 being adapted to receive the bolts, or lugs (not shown), for securing the knife in operative position on the reciprocating knife-carriage usually employed.

In accordance with the preferred form of my invention, the upper face of the knlfe 1s milled along parallel lines extending rearwardly from the front edge 6 of the knife, as indicated at? and 8. The milled portions 7, which preferably are of the same depth, incline downwardly transversely of their length from right to left in Fig. l, or in other words, at an angle to the upper face of the knife, and the milled portions 8, which also are of the same depth, incline downwardly transversely of their length from left to right in Fig. 1. The uppermost extremities 9" of the milled portions 7 extend inthe same plane, the lowermost extremities 10 of these portions and the uppermost extremities 11 of the portions 8, extend in another plane, and the lowermost extremities 12 of the portions 8 extend in still another plane, all as represented in the drawings, but more particularly in Fig. 3. The forward edge 6 of the knife is beveled along its underside as represented at 13 and thus the milled portions 7 and 8 produce at this edge a series of cutting-edges let and 15,

which alternate with each other and incline in oppositedirections relative both to the upper face ofthe knife and to'the median line of the knife, as more'clearly illustrated in Fig. hall of the cutting-edges-H being par allel and inclining in one direction, and all of the cutting edges "15 being parallel and inclining in the opposite direction; and as the millings 8 are deeper than the millings 7, the edges 15 extend in the rear of the cutting-edges 14:, as clearly represented in the drawings.

In use the knife is positioned in its holder to rest substantially fiatwise at its beveled portion 13 upon the wood-block to be shaved, the forward edge of the portion 13 being slightly pitched downwardly toward the wood-block in accordance with the usual practice in using knives of this general character. The cutting edges 14: in the shaving operation by being in advance of the cutting-edges 15 shave from the block being operated on, strips of a width equal to these cutting-edges, I ing away from the edgesl l toward the left in Fig. 1. The cutting edges 15 being in the rear of the edges 14 operate on the porthe strips thusproduced curlformed of a series of cutting-edges, alternate shave the block by a shearing action, as will be manifest, and by causing theadjacent strips to be cut by oppositely'inclined edges converging toward the front edge of the knife, which deflects the strips in opposite directions, severance of the strips from each other is insured, even where the wood being operated on is of a character, or in such condition, as to present considerable resistance to splitting.

What I claim as new and desire to secure by Letters Patent, is:

l. A shaving-knife for the purpose stated having its cuttingportion beveled and formed of a series of cuttin -edges, alternate ones of which incline in one direction relative to the median line of the knife, with the other of said cutting-edges inclining in the opposite direction. p

2. A shaving-knife for the purpose stated having its cutting-portion beveled and ones of which incline in one direction relative to the median line of the knife and also incline in one direction relative to the upper face of the knife, the others of said cuttingedges inclining in the opposite direction relative to the median line of the knife and inclining in the opposite direction relative' to the upper face of the knife, whereby adjacent cutting'edges are oppositely inclined and operate on the shearing principle.

3'. A shaving-knife for the purpose stated other of said cutting-edges inclining in the opposite direction and arranged rearwardly of the said alternate cutting-edges.

4. A shaving-knife for the purpose stated having its cutting portion beveled and formedof a series of cutting-edges, alternate ones of which incline in one direction relative to the median line of the knife and also incline in one direction relative to the upper face of the knife, the others of said cuttingedges inclining in the opposite direction relative to the median line of the knife and inclining in the opposite direction relative to the upper face of the knife, alternate ones of said cutting-edges being arranged rearwardly of the others ofsaid-cutting-edges.

5. A shaving-knife for the purpose set forth having its cutting-portion beveled and formed of a series of cutting-edges, alternate ones of which incline in one direction relative to the median'line of the knife and also incline in one direction-relative to the upper face of the knife, the others of said cuttingedges inclining in the opposite direction relative to the median line of the knife and inclining in the opposite direction relative to the upper face of the knife, the upper extremities of alternate cutting-edges being in one plane, the lower extremities of these cutting-edges and the upper extremitiesof t-heother edges being arranged in the rear of said plane, and the lower extremities of the last-referred-to edges being arranged in the rear of all the others of said extremities. 1'

JOHN w. 'KEOGH.

In presence of V V LOUISE HEISLAR, ALBERT J. SCHWARTZ.

copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, I). G. r 

